2561370534 has 48 divisors (see below), whose sum is σ = 5598891792. Its totient is φ = 846241344.

The previous prime is 2561370533. The next prime is 2561370577. The reversal of 2561370534 is 4350731652.

2561370534 is a `hidden beast` number, since 2 + 5 + 613 + 7 + 0 + 5 + 34 = 666.

2561370534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561370533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1477132 + ... + 1478864.

It is an arithmetic number, because the mean of its divisors is an integer number (116643579).

Almost surely, 2^2561370534 is an apocalyptic number.

2561370534 is an abundant number, since it is smaller than the sum of its proper divisors (3037521258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561370534 is a wasteful number, since it uses less digits than its factorization.

2561370534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421 (or 2418 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 2561370534 is about 50609.9845287469. The cubic root of 2561370534 is about 1368.2248367242.

The spelling of 2561370534 in words is "two billion, five hundred sixty-one million, three hundred seventy thousand, five hundred thirty-four".